Getting less than 6 hours a night of sleep is a risk factor in postmenopausal women with stage 1 or 2, estrogen positive, node negative breast cancer using the Oncotype DX tumor test. It measures the risk of tumor recurrence based on the expression of 21 oncogenes.
Lack of sleep causes inflammation in the body that increases the risk for obesity, type 2 diabetes, heart attacks, strokes, osteoporosis, hypertension, cancer and much more. It results in both leptin and insulin resistance.
Diet, exercise, weight management, stress reduction, adequate sleep, and avoidance of toxic exposures are all lifestyle factors that are important fundamentals that maintain good health.